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A strip threading and strip breaking technology, which is applied to metal processing equipment, metal rolling, manufacturing tools, etc., can solve the problems of strip steel rolling leakage, mandrel coiling is not tight, easy to produce scrap steel coils, etc., to reduce Effect of rolling waste, reduction of rolling waste, and improvement of yield
Active Publication Date: 2016-09-07
BEIJING SHOUGANG COLD ROLLED SHEET
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a broken belt threading method, which solves the problem that in the prior art, when the belt is threaded, it is easy to produce scrap steel coils, and at the same time, it is easy to occur that the mandrel is not tightly wound and cannot be stretched, the car starts to run away, Technical problems such as rolling leakage of strip steel in start-up
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Embodiment 1
[0031] see figure 2 , the embodiment of the present invention provides a broken belt threading method, comprising the following steps:
[0032] Step 201: The rolling mill includes a first stand 3, a second stand 4, a third stand 5, a fourth stand, and a fifth stand 7, wherein the fifth stand 7 of the rolling mill needs to be broken to replace the backup roll. Adjust the shearing and coiling speed of the steel coil to be stopped and the previous steel coil to the minimum speed of 60m / min, and the flying shears are cut and coiled by 9, so that the position of the parking strip is controlled by reducing the shearing speed of the flying shears. Avoid taking the lead into the mandrel and affecting the reversing;
[0033] Step 202: After the shearing action is completed, press the normal stop button of the rolling mill to stop. Then manually jog the coiler 10 to coil the strip steel and unload the coil, lift all the racks and roll the roll gap;
[0034] Step 203: Select the fift...
Embodiment 2
[0039] see image 3 , the embodiment of the present invention provides a broken belt threading method, comprising the following steps:
[0040] Step 301: The rolling mill includes a first stand 3, a second stand 4, a third stand 5, a fourth stand, and a fifth stand 7, wherein the third stand 5 of the rolling mill needs to be broken to replace the backup roll. Adjust the shearing and coiling speed of the steel coil to be stopped and the previous steel coil to the minimum speed of 60m / min, and the flying shears are cut and coiled by 9, so that the position of the parking strip is controlled by reducing the shearing speed of the flying shears. Avoid taking the lead into the mandrel and affecting the reversing;
[0041] Step 302: After the shearing action is completed, press the normal stop button of the rolling mill to stop. Then manually jog the coiler 10 to coil the strip steel and unload the coil, lift all the racks and roll the roll gap;
[0042] Step 303: Select the third...
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Abstract
The invention discloses a method for cutting off and threading of strip steel, and belongs to the technical field of strip steel rolling in coupled pickling and tandem rolling. The method comprises the following steps: choosing strip steel to be halted, reducing a shunt winding cutting speed of the strip steel during shunt winding and cutting; shutting down a rolling mill after shunt cutting and shunting rolling at an outlet, reeling the cut strip steel and unreeling by using a reeling machine and lifting rolling gaps of all racks; choosing a current rack required for overhauling, withdrawing the strip steel by back running and stacking the strip steel to the front side of the current rack, and overhauling the current rack; threading the strip steel of the current rack into the current rack after the overhauling is completed, inching the current rack to thread forwards to ensure that the strip steel of the current rack returns to the position before the back running; tensioning the strip steel by using a pinch roll, pressing down the rolling gaps of all racks, and starting and rolling. According to the method, the rolling mill is started by using normal rolling strip steel instead of thick strip steel, the thickness fluctuation of the rolled steel coil is small and the thickness fluctuation part is positioned at the head of the strip steel, so that rolling wastes are reduced, and the finished product rate is increased.
Description
technical field [0001] The invention belongs to the technical field of pickling continuous strip steel rolling, and in particular relates to a method for threading a broken strip. Background technique [0002] The strips of the pickling and continuous rolling production line are connected end-to-end. During maintenance, the strip needs to be cut to facilitate the staff to enter the rolling mill for maintenance operations or replace support rolls. After the maintenance work, it is necessary to re-thread the strip and start rolling. Especially for thin strip steel and high-strength steel, it is more difficult to re-thread and start the machine. There are often problems such as the mandrel coiling is not tight enough to build the tension, the machine runs off-track, and the strip rolling leaks, etc., which seriously restrict the pickling and continuous rolling production line. At the same time, it will damage the equipment, produce waste products and cause huge economic losses....
Claims
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Application Information
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